Advice plz

Any advice on how to get my blood glucose levels on fasting test lower then 90 ? For the past 3 days they've been 93-96 and today it was 117 ...ugh I'm thinking its cuz I'm not snacing after I have dinner? My other text throughout the day are great just that one is really being a pain. I don't want to have to get on anything ...especially this late in pregnancy 35+3. I have till tues to lower then ( that's when I see my Dr) ....any advice much appreciated? ??